laba_5_3_java

package com.company;

import java.io.PrintWriter;
import java.util.Scanner;

public class Main {

    private static Scanner scConsole;

    private static final String MES_TASK = "Задание: построить квадрат нечётного порядка и визуализировать построение.\n";
    private static final String MES_INPUT_REQUEST = "Введите размер квадрата:";
    private static final String MES_TRY_AGAIN = "Повторите попытку: \n";
    private static final String MES_FORMAT_INPUT_OF_PATH = "Пожалуйста, введите путь к файлу %s: ";
    private static final String MES_ASK_OUTPUT_TO_FILE = "Хотите вывести ответ в файл?\n\t1 - да\n\t2 - нет\n";

    private static final String ERROR_FILE_CANNOT_BE_CREATED_OR_OPENED = "Файл не может быть создан или открыт. Повторите попытку:\n";
    private static final String ERROR_CHOICE_IS_INCORRECT = "\tНадо ввести \"1\" или \"2\".\n\tПовторите попытку: ";
    private static final String ERROR_NOT_NUMBER = "Введено не число.\n";
    private static final String ERROR_FORMAT_NOT_EXPECTED_NUMBER = "Введено число, выходящее за рамки от %d до %d.\n";
    private static final String ERROR_NOT_ODD_NUMBER = "Введено чётное число, а ожидалось нечётное.\n";

    private static final String SYS_OP_TO_FILE_YES = "Output to file";
    private static final String SYS_OP_TO_FILE_NO = "Don't output to file";

    private static final Short MIN_SIZE = 3;
    private static final Short MAX_SIZE = 5;

    private static String choose(String sChoice1, String sChoice2, String sQuestion) {
        short nChoice = 2;
        boolean bIsIncorrect;
        String sAnswer;

        System.out.println(sQuestion + "\tВаш выбор: ");
        do {
            bIsIncorrect = false;
            try {
                nChoice = Short.parseShort(scConsole.nextLine());
            } catch (NumberFormatException e) {
                bIsIncorrect = true;
            }
            if (!bIsIncorrect && !(nChoice == 1) && !(nChoice == 2)) {
                bIsIncorrect = true;
            }
            if (bIsIncorrect) {
                System.out.println(ERROR_CHOICE_IS_INCORRECT);
            }
        } while (bIsIncorrect);

        sAnswer = nChoice == 1 ? sChoice1 : sChoice2;

        return sAnswer;
    }

    private static String inputPathToFile(boolean bIsInput) {
        String sPath;

        System.out.printf(MES_FORMAT_INPUT_OF_PATH, bIsInput ? "ввода" : "вывода");
        sPath = scConsole.nextLine();
        return sPath;
    }

    private static int readNumberFromConsole() {
        int nSize = 0;
        boolean bIsIncorrect;

        System.out.println(MES_INPUT_REQUEST);
        do {
            bIsIncorrect = false;
            try {
                nSize = Integer.parseInt(scConsole.nextLine());
            } catch (NumberFormatException e) {
                bIsIncorrect = true;
                System.out.print(ERROR_NOT_NUMBER + MES_TRY_AGAIN);
            }
            if (!bIsIncorrect && (nSize < MIN_SIZE || nSize > MAX_SIZE)) {
                bIsIncorrect = true;
                System.out.printf(ERROR_FORMAT_NOT_EXPECTED_NUMBER + MES_TRY_AGAIN, MIN_SIZE, MAX_SIZE);
            }
            if (!bIsIncorrect && nSize % 2 == 0) {
                bIsIncorrect = true;
                System.out.print(ERROR_NOT_ODD_NUMBER + MES_TRY_AGAIN);
            }
        } while (bIsIncorrect);

        return nSize;
    }

    public static int[][] makeMagicSquare(int n) {
        int[][] aMatrix = new int[n][n];
        int nHighMatrix = aMatrix.length - 1;
        int i = 0;
        int j = n / 2;
        int nCount = 1;
        int nWhenToStop = n * n + 1;

        do {
            aMatrix[i][j] = nCount;

            i--;
            j++;

            if (i < 0) i = nHighMatrix;
            if (j > nHighMatrix) j = 0;

            if (aMatrix[i][j] != 0) {
                i += 2;
                j--;
            }

            if (i > nHighMatrix) i -= aMatrix.length;
            if (j < 0) j = nHighMatrix;

            System.out.println("Шаг " + nCount + ":");
            for (int[] ints : aMatrix) {
                for (int k = 0; k < aMatrix.length; k++) {
                    System.out.print("\t" + ints[k] + " ");
                }
                System.out.println();
            }

            nCount++;
        } while (nCount < nWhenToStop);

        return aMatrix;
    }

    private static void outputToFile(int[][] aArr, String sPathToFile) {
        boolean bOutputNotReady = true;
        do {
            try {
                PrintWriter fOutput = new PrintWriter(sPathToFile);
                fOutput.print("Размер квадрата: " + aArr.length + "x" + aArr.length);

                for (int[] ints : aArr) {
                    for (int j = 0; j < aArr.length; j++) {
                        fOutput.print(ints[j] + " ");
                    }
                    fOutput.print("\n");
                }

                fOutput.close();
                bOutputNotReady = false;
            } catch (Exception e) {
                System.out.print(ERROR_FILE_CANNOT_BE_CREATED_OR_OPENED);
                String sShouldOutputInfoToFile = choose(SYS_OP_TO_FILE_YES, SYS_OP_TO_FILE_NO, MES_ASK_OUTPUT_TO_FILE);
                if (sShouldOutputInfoToFile.equals(SYS_OP_TO_FILE_YES)) {
                    sPathToFile = inputPathToFile(false);
                } else {
                    bOutputNotReady = false;
                }
            }
        } while (bOutputNotReady);
    }

    private static void outputMatrix(int[][] aMagicSquare) {
        System.out.print("Матрица:\n");
        for (int[] ints : aMagicSquare) {
            for (int j = 0; j < aMagicSquare.length; j++) {
                System.out.print("\t" + ints[j] + " ");
            }
            System.out.print("\n");
        }

        String sShouldOutputInfoToFile = choose(SYS_OP_TO_FILE_YES, SYS_OP_TO_FILE_NO, MES_ASK_OUTPUT_TO_FILE);
        if (sShouldOutputInfoToFile.equals(SYS_OP_TO_FILE_YES)) {
            String sPathToFile = inputPathToFile(false);
            outputToFile(aMagicSquare, sPathToFile);
        }
    }

    public static void main(String[] args) {
        scConsole = new Scanner(System.in);

        // Путь к моему файлу вывода: /Users/sasha/Documents/___Университет/ОАиП/Пз/Лабы/блок 5/output.txt

        System.out.println(MES_TASK);
        int nSize = readNumberFromConsole();
        int[][] aMagicSquare = makeMagicSquare(nSize);
        outputMatrix(aMagicSquare);
        scConsole.close();
    }
}